John Mayer’s star power seems to be waning once again since his split from Katy Perry. The rocker was denied entry to the bar at the Bowery Hotel on Friday night. A Confidenti@l spy says Mayer was mortified, both because of the rejection and because his pal, “The Office” star BJ … [Read more...] about John Mayer Denied Entry To Bowery Hotel Bar – his shocking reaction!